Daytona Twin Tec Twin Tuner II EFI Fuel & Ignition Controller

(6 reviews)

Item: 384044-565476

$372.95

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Daytona Twin Tec Twin Tuner II EFI Fuel & Ignition Controller


  • Twin Tuner II has all the features of the original Twin Tuner and also includes ignition timing control capability
  • Easily adjusts the OEM Delphi fuel-injection and ignition to match the requirements of performance parts including high-compression pistons/heads, camshafts, free-flowing exhausts, and low-restriction air filters add 30% or subtract 20% fuel and retard spark timing up to 10 Degree
  • You can use the mode and up/down push button switches to make fuel trim adjustments in the rpm and throttle position ranges required by most applications; the fuel trim value is displayed on a bright daylight readable LED display
  • The Twin Tuner also has an advanced mode, using the optional USB Interface and PC Link Tuner software to make precise fuel adjustments and allows independent adjustments to the front and rear cylinders
  • May be compatible with other controller maps
  • Easy plug-in installation and setup, with no splicing, cutting, crimping or bulky interconnections
  • Compact size only 4" long x 2" wide x 1/2" tall
  • Compatible with Twin Scan II+ Tuning Aid install the Twin Scan II+ and ride the bike, then copy the air/fuel ratio corrections calculated by the Twin Scan II+ into the PC Link Tuner software
  • Made in the USA
Specification Details
CARB Approved No
Country of Origin USA
EFI Type Delphi
Engine Type Twin Cam
Warranty 3 Year Manufacturer Warranty

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Harley Davidson
  • FLHR Road King 2008-2013
  • FLHRC Road King Classic 2008-2013
  • FLHT Electra Glide Standard 2008-2009
  • FLHTC Electra Glide Classic 2008-2013
  • FLHTCU Ultra Classic Electra Glide 2008-2013
  • FLHTCUTG Tri Glide Ultra Classic 2009-2013
  • FLHTK Electra Glide Ultra Limited 2010-2013
  • FLHX Street Glide 2008-2013
  • FLHXXX Street Glide Trike 2010-2011
  • FLTR Road Glide 2008-2009
  • FLTRU Road Glide Ultra 2011-2013
  • FLTRX Road Glide Custom 2010-2013

Customer Reviews


Very useable wide range of settings

By Ricky G. on  Verified Purchaser

So far so good. Seems of good quality. Install was not very bad at all old twisted stiff wires had to be gentle but got it done. Have played with tune and has relieved that lean cough. Still playing with it for mire fine tuning.


Twin tec ll 07 Street glide

By Victoria cycles on 

Was cautious about this purchase not making a difference on my bike. Easy install, and this tuner will bring your bike alive. So many changes right away and I can feel the minor horse power gain. Great purchase for the money!


Recommend tuner

By James P. on  Verified Purchaser

Was very impressed with this less expensive little box. No more spark knock and I'm no longer running lean.


Great tuner for all 36 pin Delphi H-D ECMs

By Darrell W. on  Verified Purchaser

Good instructions, easy to wire-in. Excellent customer support from Daytona Twin Tec. I set recommended programming from included chart and solved my lean condition. After I install the S&S 509 cams I'll take her to The Dyno guys for a tune. Well worth the money & time. Great alternative to more expensive tuners. Will work on any Harley Davidson 36 pin Delphi ECM. Tuning accessories available to tune yourself. 2002 Softail Deuce EFI


Twin tech 2

By Bobby A. on  Verified Purchaser

I ordered the daytona twin tech 2 not realizing I couldn't use it. I already have a power vision 4 on my bike.


Power Upgrade

By Jay C. on  Verified Purchaser

Super easy to install with great instructions. Cleared up all the issues I had with my 2005 Road King after my 103 inch upgrade to my twin cam. Running like a dream. Parts Giant has the right parts for the right price.


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Questions & Answers


popping/ rich

By Al showcase

I have a 2 into one and a S &S Breather on a stock engine will this help lean it out ? I get a lot of pops on decel or off throttle at speed. also plugs are a bit black seems rich 2002 Electra glide TC 88 FI

It might help, properly configured of course, but before you go down this road, have you checked that everything on your engine is sealed up? Specifically, make sure that the air cleaner, manifold and all exhaust gaskets are in good shape. If there's any chance of air getting in through those areas, you're more likely to encounter backfiring as fresh air leaks into the engine from various places. Considering the age of your bike, an old gasket might be the real culprit!

By Tom

2006 Harley springer Efi

By Manuel M.

Will this work with my bike using Vance and Hines staggered long exhaust and does it have options on exhaust types

Yes, this would be a very useful tuner to work with your bike's particular set, and especially, as it evolves over time.

By Tom

Is this tuner what they consider a "fooler" or is it actually making the effective changes?

By Pops

I'm not sure what your definition of fooler happens to be, so I can't comment on that. I can tell you that this particular device plugs in-between components such as the ECU/fuel injector(s), ignition &etc. (which, exactly, depends on what bike you have) and modifies the incoming or outgoing signal to enhance engine performance. The Power Commander works in much the same way. Other than that, pretty much every fuel tuner on the market works in this way. There are those that flash/reprogram new settings over to the ECU or completely replace said ECU, The Vance & Hines Fuelpak FP4 is an example of the former, while the Thunder Heart ThunderMax ECM with Integral Auto Tune System. Back to the Twin Tuner in question, this device - when configured correctly, has been proven to be an effective fuel tuner for a wide range of applications: aftermarket exhausts, air intakes and cams are well within the purview of this tuner.

By Tom

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